Freeze indicators providing a visual indication of exposure of the freeze indicator to a freezing or near-freezing temperature and their manufacture are disclosed. A piston rod cross member engages cam raceways of a pair of drive cams. As a result, a wireless transceiver located in an area where the wireless transceiver on the transmission side can be connected can be specified. In this embodiment, the catheter comprises two puller wires, one anchored proximal the other.